Side-delivery rake



March 16, 1954 M. E. HAMILTON SIDE-DELIVERY RAKE 3 Sheets-Sheet 1 Filed May 21, 1951 Zsnventor Mn rrHEW'E. HflMII-TOM tomeg March 16, 1954 M. E. HAMILTON SIDE-DELIVERY RAKE 3 Sheets-Sheet Filed May 21, 1951 I I Jnventor IVA rrl-IZW E HAM/470M m M W may M. E. HAMILTON SIDE-DELIVERY RAKE March 16, 1954 3 Sheets-Sheet :5

Filed May 21, 1951 Patented Mar. 16, 1954 SIDE DELIVERY RAKE Matthew E. Hamilton, Stockton, Calif., assignor to J. I. Case Company, Racine, Wis., a corporation of Wisconsin Application May 21, 1951, Serial No. 227,309

11 Claims.

This invention relates to a new and improved side-delivery rake and an object of the invention is to improve the operation and construction of machines of this type.

A further object of the present invention is to provide improved means for suspending the raking reel from the frame including means for adjusting the elevation and angularity of the reel with respect to the ground,

Other and further important objects of the present invention will become apparent from the following detailed description and accompanying sheets of drawings, in which:

Fig. 1 is a right-front elevational view of a sidedelivery rake embodying the present invention.

Fig. 2 is a plan view of the side-delivery rake shown in Fig. 1.

Fig. 3 is an enlarged view of a portion of Fig. 2, showing the mechanisms for adjusting the elevation and angularity of the reel with respect to the ground, with parts broken away to show details of construction.

Fig. 4 is a left-side elevational view of the structure shown in Fig. 3, with parts broken away.

Referring to the drawings, the reference numeral It) indicates generally a longitudinally disposed V-shaped arched frame which has an apex H at its forward end and diverging frame arms l2 and [3 extending to its rear end, theapex ll comprising a bracket H; which is secured adjacent the forward ends of the arms l2 and 43 by means of bolts or the like 15, and which is provided with a suitable forwardly extending clevis of any suitable type for attaching the implement to a propelling means, such as a tractor. The forward end of the frame near apex i i is equipped with a suitable leg 16 which is hinged at H, whereby, when the implement is supported by a tractor ch'awbar, or the like, the leg i5 is swung rearwardly between the arms i2 and E3. The leg it has a ground engaging foot it, and when the rake is not supported by the tractor, it supports the forward end thereof.

The central part of the rake it is raised in an arch l9 beneath which is suspended, in a manner which will presently be described, a side-delivery cylinder frame 28. The rear end of the rake frame i0 is supported by transversely aligned wheels El and 22 which are mounted adjacent the rear ends of frame arms l2 and [3, respectively. The wheels 2! and 22 are rotatably journaled in any suitable or conventional manner on opposite ends of a transverse wheel axle 23 which is rotatably supported in suitable bearings 24 and fixed against axial movement therein, the bearings 2 being secured adjacent the respective ends of the frame arms i2 and i3. Suitable frame members 25 and 26 are braced between the frame arms 12 and I3 adjacent the forward and rearward ends respectively for stabilizing the frame arms in their proper spaced 2 relationship and for resisting torsional twisting of the frame in operation.

The cylinder frame is substantially rectangular in shape and comprises side members 21 and 28 and end members 29 and 3t. Substantially semi-circular stripper bars 3! are provided which are positioned at regular intervals between the members 21 and 28 along the length thereof as well known in the art. Brackets 32 and 33 depend from each of the end members 29 and 30 and carry suitable bearings 34 and 35 in which is rotatably supported a raking cylinder or reel generally designated as 36 and preferably of the type which rakes the cut material in a true sideward motion instead of a forward and sideward motion of the more conventional reels. The reel 36 which can be of any suitable or well-known construction and constitutes no part of the present invention includes in the present instance tine rods 31 which are rotatably secured between substantially parallel enclosures or disks 38 and 39 by means of suitable bearings 60, the axis of the tine rods being so positioned so as to obliquely intersect the planes of the end enclosures. The tine rods have secured thereto in spaced relationship suitable tines M which are provided with suitable coil portions 42 for giving sufficient resiliency to the tines in operation, as well known in the art. Upon rotation of the reel, as will be explained hereinafter, the tine rods move in an elliptical path and have a substantial component of motion in the direction of their length toward the left, as appears in Fig. 2. It is the longitudinal component of the tine rods which causes the out crop material to be moved sideways along the reel to a much greater degree than would be accomplished by the reel angle alone. The end disks 38 and are provided with suitable stub shafts 43 and (is which are rotatably supported in the bearings 3t and 35 carried by the respective depending brackets 32 and 33, as previously suggested, stub shaft d3 extending laterally from the bearing 34 adjacent the right end thereof and being provided adjacent the end thereof'with a suitable gear wheel 35 which is drivingly connected by means of a suitable chain 46 to a driving gear wheel Al. Gear wheel ill is fixed to a suitable jack-shaft 8 which is rotatably supported in a housing 49 secured to cylinder frame member 28 and in an auxiliary framework 50 extending laterally of the end member 29. A bevel gear 5i is keyed or otherwise fixed to the transverse wheel axle 23 and is adapted to engage a bevel gear 52. These bevel gears El and 52 are enclosed within a gear housing 53 which is suitably carried on the wheel axle 23 adjacent the right rear wheel 22 thereof. An output shaft 54, which is fixed to bevel gear 52, projects diagonally forward from the gear box 53 and is adapted to drive a similarly directed telescopic shaft 55 through a universal joint 55 of any suitupon forward movement of the rake is imparted.

through beveled gears El and 52 to shaft 55 and consequently to stub shaft 43 by means: of: shaft 48, driving gear wheel 4?, chain 46, and gear wheel 45.

A substantially V-shapedframework or swingable element 58 is secured forwardly in spacedapart relationship to the front member-11 f the cylinder frame by means of bolts or the. like. 59

and is held in a slightly raised position with respect to the rear side member 28 of the cylinden frame by means of" braces or supports 80. Rearwardly, adjacent theapex of'the V-shaped fram'etfl, a bolt or'the'likeBlpivotall'y secures the frame toa cl'evis- 6-2 which formed in the present instanceof" parallel forwardly extending brackets 63 welded orthe like to frame member 2!? in spaced-apart relationship. The parallel brackets" 63 are provided with aligned spaced openings 64 for' supporting theV-f'rame B in ad'- jfusted' pivotal positionsonthe cl'evis. It will be appreciated that byswinging the cylinderframe and'consequently the reel'about a pivot which'is positioned rearwardly 'of the cylinder frame with respect t'othe direction of travelof "the rake, that the reel is pushed with' respect to the ground upon forward movementof'the rake so that the reel lesstendencyto lift and pass over heavy accumulations of hay or other material than if the cylinder frame was pivoted about a point forwardly of the reel. Since it is desirable in rakesof" this type that the tractor be permitted to "make av sharp "turn without striking any part ofthe rake, a frame such as the V-shapedframe 58" extending" forwardly and pivotally connected to'a clevis; such as clevis '62; secured'to. some convenient point adjacent the forward; portion. of frame it; would" provide an obstruction forwardly of the cylinder 'frameand consequently limit the turning" angle of the tractor with respect to the rake; In the present'construction. the area between: the'ap'ex H and the cylinder" frame is clear sorthata tractor can'make a sharp turn without striking, or: being limited by any obstruction;

lfhe forward elevation of' the cylinder frame and. consequently of the reel is adjustable by means. of a pair of reel-lift mechanisms. designated generally as 5.5 and. 66. The reel-lift mechanisms 55 and 66 are. connected to the forward member 2'! of.v the cylinder frame by means of suitable straps El and. 68" which. are pivotallysecuredlby. means. of? suitable bolts or the likefia' and m; betweenadjacent brackets or the. like TL. the brackets i'l'biei'ng secured tothe forward. member 21' of the cylinder. frame in spacedapa-rt. relationship. substantially adjacent the. framearms l2. and t3 and are. so positioned with respectto themernber 2'! that] the cylinder frame. is. suspended a substantially balanced condition at three points designated forwardly by boltsfi69 and "1 0-. and-:rearwardly by bolt 6|.

The reel-liftmechanism :6 5 -incl-udes in the present instance: abell: crankor rockable member 72 comprising a bearing13" having, arearwardly extending triangular flange. 14 Paralleland adjacentisubstantially trapezoidal-Pshaped plates 75 and. 16.- are secured onv opposite sides. of flange 'M bymeansof bolts or the like Tl= andwspacers 1-8: and 19 are; secured between the upper and lowenendsof the: plates by means of belts or the like an. and 81,, the spacers-.18 audits-acting as pivots, as will appear hereinafter besides maintaining the plates in spaced-apart relationship.

Reel-lift mechanism 66' includes a similarly constructed bell crank or rockable member 82 comprising a bearing 8-3 having a flange portion E l. Trapezoidal-shaped plates 85 and at are secmectto' opposite sides of flange 8-; by means of bolts 81, and spacers 88 and 88 are secured between theplates adjacent the upper and lower ends th'ereof by means of bolts 9i! and 9!.

The straps ET and 6% are provided with a suitablezlooped portion 92 and 93 respectively and the bell crank 72 is suitably journaled on a stub shaft 94 adjacent frame arm I2 so that spacer 19 is received by looped portion 92 while bell crank 32 is'sui-tably-=journaled ona stub shaft 95' adjacent frame arm iii-so that spacer 89 is received by lo-opedportion 93. The stub shaft 9-?- is fixed as by welding or the like toone end oramember 95 carried by means of depending brackets 8? and 93' from thef'rame arms t2- and I3, and stub shaft 95 is carried between upwardly extending brackets are of a member itil'; member 166 being supported fromframe arms l2 and I3 by means of depending brackets'el and Hill.

The upper spacers id-and 88' of bell cranks T2 ands! receive slotted end'or looped strap portions Hi2 and I93 of adjustable screwsor links- HM and [85. The adjustable screws orlinks Hit and I95 are" of substantially identical construction, each comprising in the present instance a female member I855 of tubular construction which has secured as by welding or the like adjacentone end thereof looped straps IE2 or I83 and adjacent the other end'thereof asuitable threaded element Hi1. A male-member [631s threaded into element ill-l and rotatably supported adjacent the other end thereof in a thrust bearing H39; of any suitable construction, which'preventsendwise movement of male member let-therein. Each of the thrust bearings 509 are provided with trunnions II!) which are supported by means of 'a suitable framework I'll carried by frame It" for permitting swingingof the adjustable screws [84 and H35 about an axis substantially parallel to the axes of the stub shafts 9 3' and fi'respectively. It will be-apparent that female member Hit of adjustable screw' tilt is of a greater length than the female member of adjustable screw I65 which'it will be appreciated is to accommodate for the angu'larity of the cylinder frame and the location of hell cranks l2 and 32' with respect to the frame It" so" as to substantially balance. the cylinder frame about bolt 51;. Suitable crank handles 1 it are fixedadjacent the ends of the respective male members 568 and extend forward suffrci'entl-ytobe within easy reach of an operator on the tractor or. other propelling means. Whenthe crank handles M2 are turned so thatthe female members l'tfi are" threaded on. themale members l't'dor are moved to the left as viewed in Figs. 3 and, the strap portions I62 and diit'pull upon thespacers it and 88 so as. to rotate or rock the bell cranks. l2 and 82 in a counterclockwise or lifting. direction, the amount of swinging movement imparted'to said bell. cranks being in proportion. to. the movement to the left of female members 595. t will be apparent that upon counterclockwise or lifting. movement of bell cranks l2 and 82; thecyli'nder framewill be swung upwardly about the bolt 5! a distance equal to the vertical distance. moved by spacers l9 and 89 by means of straps 61 and 58. When the handles IE2 are turned. intheopposite direction, the female membersv are unscrewed insthe male members I08 so as to move to'the right, the weight of the cylinder frame and the reel being sufficient to bias the bell cranks in a clockwise direction, this clockwise movement of the bell cranks being limited only by the resistance of the adjustable screws I04 and I05. When the reel has been lowered sufliciently so as to be supported on the ground, continued movement to the right of female members I05 will have no effect upon the cylinder frame, the strap portions 93 and 94 movingor sliding on the spacers I8 and 88 and having no effect upon the respective bell cranks. It will be apparent that the lifting mechanism 05 and TI limits the swinging movement of the cylinder frame in only one direction and in operation the reel, due to the length of the looped straps I02 and I03, is free to be moved or pushed upwardly sufliciently to pass over any obstruction normally encountered in operation without effecting any lineal movement to the adjustable screws I04 and I05. It will also be apparent that the control of bell crank I2 is independent of the control of bell crank 82 so that the operator, by means of handles II2, has complete control for regulating the height of the cylinder frame as well as the angularity of the cylinder frame with respect to the ground.

While the adjustable screws I04 and I05 are capable of moving the bell cranks I2 and 82 sufficiently in a lifting direction to raise the cylinder frame to a transport position, it is rather slow and tedious, and for moving the cylinder frame rapidly from one position to another, as for instance from a working position to another, as for instance from a working position to a transport position, a power-operated lifting mechanism I I3 is provided.

The power-operated mechanism II 3 includes in the present instance a hydraulic cylinder I I 4 of any conventional or suitable construction which is provided forwardly with a clevis I I 5 which is secured to a pivot I I6 by means of a pin I I! of any suitable or well-known type, pivot I06 being secured as by welding or the like to the forward brace member 25. The cylinder H4 is provided with the usual actuating rod II8 which is actuated by fluid pressure selectively delivered into opposite ends of the cylinder by means of suitable conduits or hoses IIS and I20, the hoses H9 and I20 being connected to the hydraulic system of the tractor in any suitable manner as well known in the art. The rod I08 is provided with a suitable clevis I2I adjacent the end thereof which is secured to a rock arm I22 of a rock shaft I23 by means of a pin of any suitable or conventional construction I24. Rock shaft I23 is rotatably secured to the frame arms I2 and I3 by means of suitable bearings I25 fixed in depending brackets I26 and is provided adjacent its respective ends with upwardly extending rock arms I21 and I28. The rock arms I21 and I28 are pivotally connected by means of suitable bolt I29 to one end of links I30 and I 3! respectively. Adjacent the ends of links I30 and I3I are secured by welding or the like looped strap portions I32 and I33 respectively which are received by spacers I34 and I35, spacer I34 being secured between plates I5 and 16 adjacent spacer I8 as by bolt or the like I36, and spacer I35 being secured between plates 85 and 86 adjacent spacer 88 as by a bolt or the like I31.

It will be apparent that upon expansion of the .cylinder N4, the rock arm I22 is moved from its full-line position, Fig. 4, to the position designated by the dotted lines I38 which consequently ro- "tates'rock shaft I23 in a counterclockwise or lifting direction and swing rock arms I21 and I28 from their full-line position forwardly. The links I30 and I3I are pulled forwardly by the rock arms I21 and I28 so as to swing or rock the respective bell cranks I2 and 82 in a lifting direction in unison so that the bell cranks are moved from their full-line position, which represents their normal position when the cylinder frame is in a raking elevation to a position designated by dotted lines I39, which show a portion of the respective bell cranks including bolts BI and 9| and which represent the position of the bell cranks when the cylinder frame is in its transport position. Upon movement of the bell cranks in a lifting direction, their respective spacers I8 and 88 move or slide rearwardly in the looped strap portions I02 and I03, and the cylinder H4 is so constructed that upon full expansion of rod I I 8, the bell cranks I2 and 82 will be moved from their raking position to their transport position, and the looped strap portions I02 and 103 are formed of a size sufficient to allow forward movement of the spacers I8 and 38 therein when the cylinder frame is being moved into transport position. Upon retraction of the cylinder I I4, the cylinder frame and the reel are biased downwardly upon rearward movement of the links I 30 and I 3| and the downward movement of the bell cranks I2 and 82 is limited only by the pressure exerted by the cylinder H3 upon the rock arm I22 until the spacers I8 and 8S reach the rear end of the looped strap portions I32 and I03. Further retraction of the cylinder H4 will then move the strap portions I32 and I33 rearwardly on the spacers I34 and I35 respectively, strap portions 532 and i33 being of a size sufficient to provide for complete retraction of the cylinder I I4 without effecting any movement to the bell cranks I2 and 82. It will be appreciated that if strap portions I32 and I33 did not provide for rearward movement of the links I 30 and I3i on the spacers I34 and I35 after the spacers i8 and B3 reach the rear of the strap portions I32 and I03 upon further retraction of the cylinder H4, serious damage might result if the cylinder was retracted after the spacers i8 and 83 came to the end of the slotted straps Hi2 and 833.

A radius rod I40 of any conventional or suitable construction is pivotally secured by means of a bolt M! to bracket IOI and by means of a bolt I42 to frame member 2'! of the cylinder frame 20 for preventing lateral swinging of the cylinder frame in a manner well known in the art.

Whereas many modifications of the present invention will suggest themselves to those skilled in the art after becoming familiar with the present disclosure, and whereas such modifications are even now contemplated, it is believed that the examples depicted and described will suffice for illustration of the invention, the scope of which is not to be limited however, beyond that of the appended claims.

I claim:

1. A lift mechanism for use with an implement having a movably supported frame and a swingable element carried by the frame, said lift mechanism comprising a rockable member pivoted on said frame, means connecting one end of said rockable member to said swingable element for swinging said swingable element in one direction, an adjustable link rotatably supported on said frame while being prevented from moving axially with respect thereto and being slidably secured adjacent one end thereof to said rockablev member adjacent the other end: thereof whereupon said. swingable-element is permitted toswin'g in saidone directionwithout effecting any 'li-nea'l movement to saidadjustable link, said adjustable link upon lineal adjustment in one direction: rocking said rockable member-"for swinging said swingable element in said one direction, a r o'cki'shaft having a rock arm rotatably carried by said frame, a: power link pivotally secured to said rock armandslida-bly secured adjacent the other end thereof to said rockable member whereupon said. swingable element is permitted to swing in saidone direction without effecting any lineal movement to said power link, and a power-operated cylinder carried by said frame and connected' to said rock shaft for rocking said rock shaft in one direction forv rocking said rockable member for swinging said swingable element in said one direction.

2'. A lift mechanism for use with an implement having a movabiy supported frame and aswingable element carried by the frame, said lift mechanism comprising a rockable member pivoted on the frame, means connectone end of said rockable member to said swingable element for swinging said swingable element in one direction in response to rocking of'said rockable member in one direction, a thrust bearing carried on the frame, an adjustable screw rotatably supported in said thrust bearing'while being prevented from moving endwise therein and being provided with a slotted portion adjacent one end thereof, means on said rockable member adjacent the other end thereof for receiving the slotted end portion of said adjustable screw whereupon lineal adjustment of said screw in one direction will rock said rockable member in said one direction for swinging said swingable element in said one direction said swingable element being permitted free swinging movement in said one direction to the extent allowed by said slotted portion.

3. A lift mechanism for use with an implement having a movably supported frame and a swingable element connected to the frame, said lift mechanism comprising a rockable member pivoted on the frame, means connecting one end of said rockable member to said swingable element for swinging said swingable element in one direction in response to rocking of said rockable member in one direction, a thrust bearing carried on the frame, an adjustable screw rotatably supported in said thrust bearing while being prevented from moving endwise therein and being providedadjacent one end thereof with a slotted portion, means on said rockable member adjacent the other end thereof for receiving the slotted end portion of said adjustable screw whereupon lineal adjustment of the screw in one direction will rock said rockable-member in said one direction for swinging said swingable element in said one direction, a rock shaft having a rock arm rotatably carried by said frame, a power'link pivotally secured to said rock arm and provided adjacent its end with a slotted portion, means on said rockable member for receiving said slotted portion, a power-operated cylinder carried by said frame and connected to said rock shaft for rocking said rock shaft in one direction for rocking saidrockable member in said one direction for swinging said swingable element in said one direction, said second-mentioned means being accommodated by theslotted' portion of said ad'- justablescrew upon rocking of said rockable member by said pcwer=eperated cylinder;

4s.- A- lift mechanism for usewith an implement having a movably supported frame and a swingable element carried by theframe and biased to swing in one direction, said lift mechanism comprising a bell crank pivoted on the frame, a link between one end of said bell crank and said swingable element for swinging said swingable element in the other direction in response to rocking" of said bell crank in one direction, a thrust bearing carried on the frame, an adjustable screw rotatably. supported in said thrust bearing while being prevented from moving axially therein, one end of said'a'djust'able screw extending forwardly therefrom to within reach of the operator and the other end of said adjustable screw extending rearwardly and provided with a slotted portion adjacent the end thereof, said thrust bearing having means for permitting swinging movement of said adjustable screw about an axis substantially normal to the axis thereof, and means adjacent the other end of said bell crank for receiving said slotted portion whereupon lineal adjustment of said screw in one direction will rock said bell crank in said one direction for swinging said swingable element in said other direction.

5. A lift mechanism for use with an implement having a movably supported frame and a swingable element carried by the frame and biased to swing in one direction, said lift mechanism comprising a bell crank pivoted on the frame, alink between one end of said bell crank and said swingable element for swinging said swingable element in the other direction in response to rocking of said bell crank in one direction, a thrust bearing carried on the frame, an adjustable screw rotatably carried in said thrust bearing while being prevented from moving axially therein, one end of said adjustable screw extending forwardly therefrom to within reach of the operator and the other end of said adjustable screw extending rearwardly and provided with a slotted portion adjacent the end thereof, said thrust bearing having means for permitting swinging movement of said adjustable screw about an axis substantially normal to the axis thereof, means adjacent the other end of said bell crank for receiving said slotted portion whereupon lineal adjustment of said screw in one direction will rock said bell crank in said one direction for swinging said swingable element in said other direction, a rock shaft having a rock arm rotatably carried by said frame, a power link pivotally secured to said rock arm and provided adjacent one end thereof with a slotted portion, means adjacent the second-mentioned means for receiving the slotted portion of said power-link, and a power-operated cylinder carried by said frame and connected to said rock shaft for rocking said rock shaft in one direction for rocking said bell crank in said one direction for swinging said swingable element in said other direction.

6. In a side-delivery rake having an arched supporting frame adapted to be held at its forward end by a propelling means and at its rearward end by a two-wheel axle, a cylinder frame, a raking reel rotatably carried by said cylinder frame, a V-shaped framework secured in spaced apart reiationship'to said cylinder frame and extending rearwardly therefrom, and means adjacent the rear of the supporting frame for swingably supporting said framework adjacent the apex thereof about a transverse axis for positioning theraking' reel obliquely with respect to the direction of'travelofsaid side-delivery-rake; said cylinder frame being biased for swinging in one direction, the improvement comprising a pair of spaced lift mechanisms each of said lift mechanisms comprising a bell crank swingable about a fixed pivot, a link pivotally connected to one leg of said bell crank and movable in a lifting direction in response to rocking of said bell crank in one direction, a crank swingable about a fixed pivot longitudinally spaced from the first mentioned pivot, a power link pivotally connected to said crank adjacent one end thereof, a lost motion connection between the other leg of said bell crank and said power link for rocking said bell crank in said one direction in response to rocking of said crank in one direction, power-operated means for rocking said crank, an adjustable link rotatably supported about a fixed pivot, and a lost motion connection between said adjustable link and said other leg of said bell crank said bell crank being rockable a predetermined distance in said one direction without effecting movement to said power link or to said adjustable link.

7. In a side-delivery rake having a movably supported frame and a cylinder frame carried by the frame for up-and-down swinging movement, the improvement comprising a lift mechanism including a bell crank swingable about a fixed pivot, a lifting link pivotally connected to one leg of said bell crank and adapted to be moved in a lifting direction in response to rocking of said bell crank in one direction, a crank swingable about a fixed pivot longitudinally spaced from the first mentioned pivot, a power link pivotally connected to said crank adjacent one end thereof, a lost motion connection between the other leg of said bell crank and said power link adjacent the other end thereof for rocking said bell crank in said one direction in response to said crank being rocked in one direction, power-operated means for rocking said crank, an adjustable link rotatably supported about a fixed pivot and extending in the direction of said bell crank, said link being manually operative for lineal adjustment thereof, and'a lost motion connection between said other leg of said bell crank and said adjustable link.

8. A lift mechanism for use with an implement having a movably supported frame and a swingable element connected to the frame and biased to swing in one direction, said lift mechanism comprising a rockable member pivoted on said frame, means interconnecting one end of said rockable member and said swingable member, a link rotatably supported on said frame while being prevented from moving axially with respect thereto and extending in the direction of said rockable member, said link being manually operative for effecting lineal adjustment thereof, a looped strap fixed to said link adjacent said rockable member, means fixed to said rockable member adjacent the other end thereof and slidably received in said looped strap, whereupon, said rockable member is held against swinging movement in said one direction in predetermined positions, said rockable member being freely swingable within the limits defined by said looped strap independently of any lineal adjustment of said link, lineal adjustment of said link being effective for supporting said swingable element in predetermined positions with respect to said frame.

9. A lift mechanism for use with an implement having a movably supported frame and a swingable element connected to the frame and biased to swing in one direction, said lift mechanism comprising a rockable member pivoted on said frame, means interconnecting one end of said rockable member and said swingable element, a rock shaft rotatably carried by said frame, said rock shaft having a rock arm depending therefrom, a power link pivotally secured to said rock arm and extending in the direction of said rockable member, a looped strap fixed to said power link adjacent said rockable member, means fixed to said rockable member adjacent the other end thereof and slidably received in said looped strap whereby said rockable member is freely rockable within the limits defined by said looped strap, and a power operated cylinder carried by said frame and connected to said rock shaft for rocking said rock shaft in one direction for swinging said swingable element in the other direction.

10. A lift mechanism for use with an implement having a movably supported frame and a swingable element carried by the frame and biased to swing in one direction, said lift mechanism comprising a rockable member pivoted on the frame, means interconnecting one end of said rockable member and said swingable element, a rock shaft rotatably carried by said frame, said rock shaft having a rock arm depending therefrom, a power link pivotally secured to said rock arm and extending in the direction of said rockable member, a looped strap fixed to said power link adjacent said rockable member, means fixed to said rockable member adjacent the other end thereof and slidably received in said looped strap for interconnecting said rockable member to said power link, said rockable member being freely swingable within the limits defined by said looped strap, and a power-operated cylinder carried by said frame and connected to said rook shaft for rocking said rock shaft in one direction for rocking said rockable member, for swinging said swingable member in the other direction.

11. A lift mechanism for use with an implement having a movably supported frame and a swingable element carried by the frame and biased to swing in one direction, said lift mechanism comprising a bell crank pivoted on said frame, said bell crank including a pair of plates fixed in predetermined spaced apart relationship, a link interconnecting one end of said bell crank and said swingable element, said link being connected between said plates adjacent corresponding ends thereof, a rock shaft rotatably carried by said frame, said rock shaft having a rock arm depending therefrom, a power link pivotally secured to said rock arm and extending in the direction of said bell crank, a looped strap fixed to said power link adjacent said bell crank, means fixed to the other leg of said bell crank and interconnecting corresponding ends of said plates and slidably received by said looped strap whereby said bell crank is freely rockable within the limits defined by said looped strap, and a power operated cylinder carried by said frame and connected to said rock shaft for rocking said shaft in one direction for rocking said bell crank for swinging said swingable element in the other direction.

MATTHEW E. HAMILTON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,491,211 Rietz Dec. 13, 1949 2,518,389 Sisulak Aug. 8, 1950 2,531,934 Crose Nov. 28, 1950 2,609,649 Watson Sept. 9, 1952 

